This is one of those cases where there are four hostas with the same name. One is registered and, therefore, the "official" version of H. 'Fireworks' while the others are non-registered plants and need to be renamed to avoid further confusion.

Walters Gardens, Inc. of Michigan registered this sport of H. 'Loyalist' in 2001 after it had been discovered by Mary Zwagerman. 'Fireworks' was awarded a U.S. patent in 2005. The small size (6 inches high by 10 inches wide) hosta has wavy, twisted leaves and lavender flowers in July.

The Hostapedia by Mark Zilis (2009) says, "At least three different hostas have borne the name 'Fireworks'. The plant from Walters Gardens, however is the one registered with The American Hosta Society. .. In the garden, 'Fireworks' has a radically different appearance from 'Loyalist'. The narrower leaf margins and blade shape and smaller mound size gives it the look of a juvenile form of its mother plant."

The Book of Little Hostas by Kathy and Michael Shadrack (2010) says: "Cannot take much sun in warmer climates and prefers dappled shade. Ideal as a contrast in collections of small hostas with plainer foliage."

The New Encyclopedia of Hostas by Diana Grenfell (2009) states: "Can exceed its registered dimensions...Smaller than its parent, with sharp contrast between the base color and the marginal variegation."

Hosta Helper will call this plant 'Fireworks' (Walters).
 

United States Patent: PP16062  (2005)

Abstract: A new and distinct Hosta plant named ‘Fireworks’, characterized by narrow pointed leaves having deep green margins, and a creamy yellow to creamy white center, that displays a unique upright habit and light lavender flowers held above the foliage on thick cream-colored scapes.

According to The Hostapedia by Mark Zilis (2009), Dr Ralph (Herb) Benedict of Michigan had a Tardiana-type hosta by this name.

Hosta Helper will call this plant 'Fireworks' (Benedict).

According to The Hostapedia by Mark Zilis (2009), Bob Balitewicz of Indiana had a plant called 'Fireworks', but he changed the name to 'Yankee Blue'.

Hosta Helper will call this plant 'Fireworks' (Balitewicz).

'Fireworks' is also the English translation For an existing cultivar with the French name H. 'Feux d'artifices'  from Jocelyne Bastille of Aux Mille Hostas in Canada.

Hosta Helper will call this plant 'Fireworks' (French).